Unable to connect to mongo on remote server

Question

I have installed mongo on machine1(Ubuntu 14.04.3 LTS server) in my local network. I have also opened the port 27017 as mentioned in this guide using following commands:

sudo iptables -A INPUT -p tcp --destination-port 27017 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT  -p tcp --source-port 27017 -m state --state ESTABLISHED -j ACCEPT

Current rules are (iptables -L):

Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:27017 state NEW,ESTABLISHED

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere             tcp spt:27017 state ESTABLISHED

---

But I am not able to connect to this port from machine2 (in the same network):

$ mongo --host 192.168.0.108
MongoDB shell version: 3.0.4
connecting to: 192.168.0.108:27017/test
2016-01-23T18:02:14.848+0530 W NETWORK  Failed to connect to 192.168.0.108:27017, reason: errno:61 Connection refused
2016-01-23T18:02:14.850+0530 E QUERY    Error: couldn't connect to server 192.168.0.108:27017 (192.168.0.108), connection attempt failed
    at connect (src/mongo/shell/mongo.js:181:14)
    at (connect):1:6 at src/mongo/shell/mongo.js:181
exception: connect failed

I also tried checking if port is opened or not:

$ nc -v 192.168.0.108 27017
nc: connectx to 192.168.0.108 port 27017 (tcp) failed: Connection refused

I am not sure what I am missing. Must be some silly mistake as I am setting up mongo for the first time. Pls help.

Some more info

1. Mongo daemon is running. I am able to connect to mongo form the same machine but not from the other machine. The daemon is running:

   $ service mongod status
   mongod start/running, process 31205
   

   and the port is 27017

   $ sudo netstat -tulpn | grep 27017
   tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 31205/mongod
   

2. I changed the bind_ip to 0.0.0.0 (as suggested somewhere) and restarted mongo. Still the same error is coming.

3. Distro Info:

   $ cat /etc/*release
   DISTRIB_ID=Ubuntu
   DISTRIB_RELEASE=14.04
   DISTRIB_CODENAME=trusty
   DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
   NAME="Ubuntu"
   VERSION="14.04.3 LTS, Trusty Tahr"
   ID=ubuntu
   ID_LIKE=debian
   PRETTY_NAME="Ubuntu 14.04.3 LTS"
   VERSION_ID="14.04"
   

Solution

The issue was bindIp didn't change. There was some issue in restarting mongo from my side.

The habit should be to verify if the bindIp actually changed or not. (using sudo netstat -tulpn | grep 27017)

Thanks steeldriver for pointing it out.

Comments

[Abhishek Gupta]

Yes you are right. bind_ip didn't change because of some issue in restarting mongo. Pls answer so that I can accept Or I will answer with your solution.

[steeldriver]

Please go ahead and add your own answer - I know nothing about mongo ;)